Air-compressor.



No. SBL'QS. PATENTLD MAR. '10, 1908. J. STURGESS.

AIR COMPRESSOR.

APPLICATION LED JULY l1. 1907.

2 SHEETSfSHBET 1.

No. 88ly498. PATENTBD MAR. 10, 1908, J. STURGESS.

AIR COMPRESSOR.

APPLIUATION HLBD JULY 11.1907.

2 SHEETS-SEEBT 2.

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WWNEEEJEEE 31m/ENT UR H. 54 ad@ d ,fr '/v?. lf

JOHN STURGESS, O1" TROY, NEW YORK.

lSpeeication. of Letters Patent.

.AIR-COMPRE SSOR.

Patented March 10, 1908.

Application filed July 11, 1907. Serial No. 383,220.

To all whom it may concern:

Beit known that I, JOHN STURGEss, a subject of the King ofGreat'Britain, residing at Troy, county of Rensselaer, and State of NewYork, have invented certain new and useful Improvements inAir-Compressors, of which the following isa specification.

The invention relates to such improvements and consists of the novelconstruction and combination of parts hereinafter described andsubsequently claimed.

Reference may be hadto the accompanying drawings, and the referencecharacters marked thereon, which form a part of this specification.Similar characters refer ,to similar parts in the several figurestherein.

Figure 1 of the drawings 1s a view in sidev elevation of my improvedair-compressor. Fiv. 2 is a central vertical section of the same takenon the broken line 2-2 in Fig. 1, showing the moving-parts in midposition. Fig. 3 is a similar view showing the moving parts in theposition which they assume at the end of the upward movement. i

The principal object of the invention is to provide a simple andeflicient mechanism for compressing air and other gases, and theapparatus is especially designed for operation at high speed although itmay be operated at any speed desired.

Referring to the drawings wherein the in vention is shown in preferredform, 1, represents a' slideway in a yoke formed by the two members, 2and 3, secured together by bolts, 4, Within which slideway is adapted toreciprocate a split bearing-block, 5, for a crankpin, 6, on thecrank-shaft 7.

Projecting from the yoke in opposite dieach adapted to receive and it astationary piston, 9, mounted upon the frame, 10, of the machine,whereby the yokevis guided in its to-and-fro movement induced by" therotation `of the crank-shaft, which movement is accompanied by amovement of the bearing-block, 5,

to-and-fro in'its slideway; 1,

An inlet opening, 11, is formed through one wall of the slideway, 1,leading into the upper cylinder, 8, and a similar opening, 12, is formedthrough the opposite slideway surface leading into the lower cylinder 8.

Each ofthe openings, 11 and 12, is adapted to be closed at certain timesby thc bearingblock, 5, and said openings are so arranged that theopening to the upper cylinder is uncovered and opened at about the timethat the downward movement of the yoke and cylinders begins, and isclosed by the bearing-block, 5, at about the time that the upwardmovement of the yoke and cylinders begins, while the opening into thelower cylinder is uncovered and opened at about the time that the upwardmovement begins, and is closed by the bearing-block, 5, at about thetime that the downward movement befflns. D As the yoke and cylinders arereciprocated by the action of the crank, at each upward movement the airwill be compressed within the upper cylinder, and at each downwardmovement within 4 ne lower cylinder, the air entering the respectivecylinders through the yoke, and openings, 11 and 12, in the yokeslidewaywhen said openings are uncovered. An outlet for the air thus compressedin the respective cylinders is formed by a passageway, 13, extendingaxially through each piston andterminating in a conical chambercontaining a conical valve, 14, adapted to engage an annular valve-seat,15, at the larger end of said conical chamber.

The valve is yieldingly held to its seat by a coil-spring, 16, whichyields to the controlling pressure within the neighboring cylinder topermit the escape of the compressed air from said cylinder throughsaid-valvc-seat.

The opening surrounded by the valveseat is of substantially the samediameter as the cylinder, so that a very small movement of the valve isrequired.

At its outer end the piston is provided' with a cap or head, 17, closingthe conical chamber, through which cap or head extends a passageway, 18,through which .the compressed air escapes to the delivery plpe, 19, whenthe valve is open.

I have shown each of the stationary pistons provided with awater-jacket, 20, with connecting inlet and outlet pipes, 21 and 22,whereby the parts can be kept cool if desired.

It is obvious that air can be-compressed in either cylinder,independently 0f the other, and that if only one of the cylinders isutilized for compressing the air, the other cylinder and its pistonsimply perform their functions of guiding the moving parts.

I have described my improved apparatus in its use for compressing air,but it is equally adapted for compressing any gas.

What I claim as new and desire to secure by Letters Patent is 1. Inanapparatus of the class described,

. upon one side of seid yoke willi the Space :'-m'nl nwinnme lovfmal:mil in meloeed by sznfl piston and cylinder com tlieeonilvina tionwilli n. yoke having S slideu w :1y provided with :in openingtherethrough;

a, crank and crank-nin; and n lwming-bloek lol the crunk-inn filling:unl movable along u Said slideway and :nlepteil to open and eloee .willopening; of a piston and cylinder, one mounted upon a fixed support andthe other @son said yoke with the space inclosed by sind piston andcylinder conimuniceting with Said opening; and a cheek-valve oontrollingen outlet from seid inelosed space 2. ln an apparatus of the dassdeeeiibeiL the combination Willi, n yoke having n slide Way providedwith a pair of openings filiere-- tlirough; L crank and crank-pin; :unln bearing-block for' the crank-pin :fitting :ind movable along saidslideway and adapted to alternately open and Close the respectivoopenings; of" a iston and cylimlor, mie mounted upon a, Xed support. andthe m'ln'i' mu'nieating with one of said openings; :1 piston andcylinder, one n'ioni'xted upon :i fixed support and the other upon dieonlie site side of Said yoke with the space in closed between Said .lastmentioned pieton 'end cylinder communicating wien (ille other "ofseidnpenings; and a. clierl\:-w!ve unntrolling an Outlet from each ofenifl ineloseil spin 3J 3. In an eppeii'elns 01"' che class described,and in combination, e pen ol'- nivinlwins @ein` prising si cylinder, anda pielon filling there- W'itliin, seid en linder being pim'iflcfl withan. inlet-opening lo ilie space ineleeml lilv will piston and Cylinder,and the pieten being provided with :in outlet-opening lending from Saidinclosed space and being provided. in its outer end willi :in enlargedchamber eoinnnxnieaing willi, said onlie/lf opening; :in zmtoniznicnllyclosing cheekn valve mlnpfled when eloeeilno subeyentinl-ly fill saidchamber and lo close an outlet tieife- 25 from of Substantially the(linirne'ler of sind inlolmpening te tile :,-rpnee i {wypieton. andcvlmflei, :mii the i: h'

cylinder means for moving one of Suhl members iuowzn'il :unl from theother; und

ineens for opening; and (closingP the inlvlopening ln the oylixnier.,

l. ln :in zippnmue of the cines desmilwjfil, Il() :ind in eenliinu'fion,n paxil' of mami :s vom piising n, eylindm, and n piston 'linlgLliurewi'tlxin, Suid cylinder being la nilml pfsowiilell with :in axial.pim-mgggnv. y nnmiceiing with anni epenre und willi n cfm-- ic'nlolminlim eonmnmlending :V @im will l said p:1:1su; f0.vejf and havin@nil olf nani vlmmlwei :1, vulve-- ing; :in om'le-opening of :ipp(linnieer ol" the ejvlinfl' 1'; am mmm-.i closing conivzil -,lie-";-v:il\ :nlfq'iml w. closed lo ong@ will wel, nml Hulman" w lill :willclxzinilwi". nnnne 'iT-i muvinl one of 6.,.

:unl 'inname im* opening nm: opening lo Ene vvlindoi'.

5. ln fin am Lmzue of llie wlmi; lr\:-';vi`il\mi, and in minliinnl'ion,u puis' of 'jmlw ifnvnl'wis secured loggelie with n snlmx l innen? :unlein-l1 handing on iis -n` hollen,` cylinder und piwiaf ture iuznlinf;'from anni el' cylmll im im,n l' l along sanl slirlewziy :ml nnlvelj,open :unl close snnl :L Deir of pistone fixen rzonnlfxl within open endsor smid i' "fimi'me e. elxocliffnlve vonliolln space -inelosed l); wiel:'mlei.

